Robert F. Fischer Books

Optical System Design

By Robert Edward Fischer, Bijana Tadic, Robert F. Fischer

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"Move through any project more quickly, expertly, and painlessly. Optical System Design is packed with optical system design techniques in an easy-to-use format. Whether you're a beginner or someon...

Optical System Design, Second Edition

By Robert Edward Fischer, Robert F. Fischer

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Combat bandsman

By Robert F. Fischer

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"Playing trumpet in the 9th Infantry Division Band should have been a safe assignment but the Viet Cong swarmed the Mekong Delta and safety was nonexistent. This memoir of a conscripted musician in...

Combat Bandsman

By Robert F. Fischer

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Optical System Design, Second Edition

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.